Door lock



E. W. NORTH ET AL March 27, 1956 pooR LOCK 5 Sheets-Sheet 1 Filed June18, 1954 March 27, 1956 E. w. NORTH ET AL DOOR LOCK 5 Sheets-Sheet 2Filed June 18, 1954 March 27, 1956 E. w. NORTH ET AL 2,739,472

DOOR LOCK Filed June 18, 1954 5 Sheets-Sheet 3 J n/rz farts. [ya/4ndWarib.

March 27, 1956 E. w. NORTH ET AL DOOR LOCK 5 Sheets-Sheet 4 Filed June18, 1954 Ira/2:221:14 fdwz'rzwfiorffi. fla nab 4. 512415 01; W

March 27, 1956 1:. w. NORTH ET AL 2,739,472

DOOR LOCK Filed.June 18, 1954 5 Sheets-Sheet 5 United States Patent noonLOCK Edwin W. North and Francis lL. Erickson, Rockford, Ill., assignorsto National Lock Company, Rockford, 111., a corporation of DelawareApplication June 18, 1954, Serial No. 437,658

12 Claims. ca. 70-146) The present invention relates to a door lock andmore particularly to a novel door lock assembly having an inner and anouter knob for retracting a latch bolt to permit opening of the door,the inner knob being provided with a turn button adapted to lock theouter knob against turning movement and retraction of the latch bolt.

Among the objects of the present invention is the provision of a noveldoor lock in which the inner knob is provided with a novel turn buttonassembly for locking the outer knob against turning movement, and anovel cam and tube assembly upon which the outer and inner knobs aremounted in such manner that the inner knob may be rotated and the dooropened from the interior when the turn button is in locked or unlockedposition, but the outer knob is capable of turning to retract the latchbolt only when the inner knob is unlocked. In the disclosed embodiment,the locking of the outer knob from the interior by turning the turnbutton of the inner knob maintains the outer knob against turningmovement until the turn button is released, thereby preventing accessfrom the exterior to the interior of a room or other enclosure except bymeans of the requisite key for turning the lock tumbler in the outerknob to unlock the door.

Another important feature of the present invention is the provision in adoor lock of a novel cam and tube assembly upon which the outer andinner knobs are mounted and housing the locking mechanism forcontrolling turning of the outer knob.

A further object of the present invention is the provision in a doorlock of a novel cam tube, inner tube and sleeve assembly mounted inconcentric relation and so constructed, arranged and connected that whenthe outer cam tube and its outer knob are locked against rotation, thesleeve carrying the inner knob and the inner tube connected thereto arepermitted to rotate relative to the cam tube to thereby retract thelatch bolt without turning or releasing the cam tube and its outer knobfrom locked position.

Another important object of the present invention is the provision in adoor lock of a novel means and mechanism for retracting a latch bolt andincluding a novel cam tube, inner tube and sleeve assembly including asplit cam tube upon which the outer knob is mounted and adapted to carrya key-actuated tumbler lock, a split sleeve adapted to carry an innerknob provided with a turn button, and an inner tube carried in theadjacent ends of the cam tube and sleeve all connected into an assembledunit in such manner that the sleeve and inner tube rotate together andthe inner tube and cam tube are connected for limited rotationtherebetween, whereby the outer knob and its cam tube may be lockedagainst rotation while permitting the inner knob, sleeve and inner tubeto rotate and withdraw the latch bolt.

The present invention further comprehends a novel housing assembly for adoor lock in which the cam tube is journalled in the opposite end wallsof the housing.

2,739,472 Patented Mar. 27, 1956 A further object of the presentinvention is the provision in a door lock assembly of a novel turnbutton assembly for locking the exterior or outer knob against turningmovement.

Further objects are to provide a construction of maximum simplicity,eiiiciency, economy and ease of assembly and operation, and such furtherobjects, advantages and capabilities as will later more fully appear andare inherently possessed thereby.

In the drawings:

Figure 1 is a perspective view of the novel lock construction as itappears when completely assembled for use in a door or other closure.

Fig. 2 is a disassembled view of the separate latch bolt unitdisconnected from the cam and tube assembly with its assembled housing,outer clamp plate, outer escutcheon and outer knob, and showing thesetwo assemblies ready to be inserted into their respective bores in adoor or other closure, after which the inner clamp plate, innerescutcheon and inner knob are assembled upon the cam and tube assemblyto complete the assemblage.

Fig. 3 is an enlarged view in horizontal cross section takenlongitudinally through the assembled lock construction, except for thelatch bolt assembly which is shown in plan, and illustrating the mannerof mounting it in a door or other closure. L

Fig. 4 is a view in front elevation of the housing assembly and itsdisassembled outer and inner clamping plates. 7

Fig. 5 is a view in vertical cross section taken on the line 5-5 of Fig.3 and viewed in the direction of the arrows.

Fig. 6 is a fragmentary enlarged view in vertical cross section takenlongitudinally through the outer knob and assembled lock cylinder withthe key inserted to release the latch bolt when the outer knob is lockedfrom the interior of the door.

Fig. 7 is a top plan view of the cam and tube assembly, together withthe housing.

Fig. 8 is an exploded or disassembled view in perspective of thecomponent parts of the cam and tube assembly of Fig. 7, but showing theparts on a smaller scale than in Fig. 7.

Fig. 9 is a view similar to Fig. 3 but showing the lock assembly withoutthe key lock and with a modified form of housing assembly.

Fig. 10 is a view in front elevation of the housing assembly and itsdisassembled outer and inner clamping plates shown in Fig. 9.

Referring to the disclosure in the drawings and more particularly to thenovel illustrative embodiment therein shown, the disclosed embodiment ofa lock assembly is adapted for use with a door or closure having anouter knob adapted to be locked or unlocked from the interior of a roomor other enclosure by the rotation of a turn button. When the turnbutton on the inner knob is manually turned or moved to unlockedposition, the door may be freely opened from the interior as Well asfrom the exterior by a mere turning of either knob which in turnretracts the latch bolt.

Upon manual turning of the button to locking position the outer knob islocked against turning movement but the inner knob may be turned toretract the latch bolt and permit opening of the door from the interior.How ever, such turning of the inner knob without turning of the turnbutton does not release the outer knob for turning and does not releasethe turn button from its locked position so that upon again closing thedoor the door is locked to the exterior. In the embodiment shown inFigs. 1 to 7, inclusive, the door may be unlocked from the exterior by akey inserted into the cylinder of a tumbler or look mounted within theouter knob, so that upon turning of the key the latch. bolt isretracted.

In the embodiment shown in Figs. 1 to 7, inclusive, the novel lockconstruction includesran outergknob .10 mounted .atzthe exterior of adoor orrclosure llupon the outer end of a split cam Ltube 12,-.and;an:inner =k110b13. mounted at the interior of a door or closure upon asplit sleeve 14. These knobs and 13 are securelytbut-detachably mountedon the opposite ends of a cam and tube assembly shown ingreater detailin Figs. 7 and '8, and which ineludes the splitcam 12, .an inner tubeand the sleeve 14 all connected together insuch'rnanuer, that the innertube 15 and its external sleeve 14 which encompasses and conformablyreceives the inner. end -or"--.the inner lllbfi 15 are securely orfixedly connected together, but .the split cam tube 12 which encompassesand conformably receives .the-outerend of the inner tube 15 is capableof turning upon the outer-end of the inner tube through a limited arc oftravel, but afiixed thereto against longitudinal movement.

To connect the cam tube 12 to the inner tube 15 for limited rotationtherebetween, the cam tube is provided at 16 with two narrow transverseslots adjacent the inner end of this cam tube whereby to provide arelatively nar row connecting strip 17 adapted to lac-depressed orindented into an arcuate, slot 18 in an intermediate portion of theinner tube 15, thereby staking theparts together but permitting limitedrotation therebetween.

The cam tube 12 is longitudinally split or slotted at 19 with this slotextending for a substantial portion of the length of the tube andadapted to receive a detent 210m the knob 10 fitting conformably withinthe slot 19 and thereby aligning the knob 10 upon the cam .tube 12 andpermitting its ready assembly by sliding the knob longitudinally ontothe cam tube (Fig. 3). To detachably connect .the outer knob 10 inanchored position, the cam tube 12 at a point diametrically opposite thelongitudinal slot 19 is provided with a recess or opening 22 adaptedto.receive a button 23 (Figs. 3, 7tand '8) staked or affixed to anarcuate expansible or snap spring 24 carried within and .upon the innercylindrical wall of the cam tube and forcing this button 23 outwardlythrough the recess or opening 22. To receive the projecting end of thisbutton, the neck of the outer knob .10 is provided with a recess oropening 25 which when aligned with the button '23, the latter snaps intolocking engagement in the recess andretains the outer knob 10 assembledon the cam tube .12. The cam tube is further provided with diametricallyopposed longitudinally extending slots .26 open attheir outer end forslidably receiving a key lock assembly 27 in the outer knob 10(Figs. 3and 6).

The inner knob 13 is adapted to be mounted upon and detachably anchoredto the split sleeve member 14 by means of a detent 28 adapted to vbeconformably received in a longitudinally extending slot .29 in thesleeve member (Figs. 1, 2 and 3) and aspring pressed knob holder 31, theprojecting end of which extends through a transverse slot 32 in thesleeve 14. A leaf spring '33 has one end 34 anchored in a slot in theholder and the other end 35 bent and received and anchored in atransverse slot 36 spaced from the transverse slot 32, whereby theprojecting end'of the'knob holder -31-is'spring-biased to elevated orextended position. This leaf spring 33 islocated in a longitudinallyextending slot 37 and flattened end portion 38 of the inner end-of theinner tube '15 (Figs, 7 and .8). The projecting end of the knob :holder.31is adaptedto beyreceived in an elongated,transverse. slot 39 in theneck of the knob whereby the inner knob 13 is detachably locked, to'the'sleeve 14.

The sleeve 14 is attached ,or rigidly anchored ,to the inner concentrictube 15.by means .ofapair of oppositely disposed tongues41 (Figs. 2,7and 8), each of which is bentor staked intoan aligned'longitu'dinallyextending slot 42 at .the opposite end of a circumferentially extendinggroove '43 in the inner tube'15'.

' The 'outer end of the'inner tube 15 is provided with ably receivingthe projecting end 45 of the key lock assembly 27, and the tube receivestherein in sequence a guide ring 46 disposed adjacent the flanges 44, aguide coil spring 47, a guide washer 48 having a peripheral portionthereof cut away .at 49, ,and a locking lever or slide bar 50. Thislocking lever or slide bar is provided at its outer end with a laterallyprojecting leg 51 having spaced projections 52 and 53, the projection 52extendinginto and centered in an opening 54 inthe guide'was'her 48 andthe leg 51 being adapted to be moved'into locking engagement with a slotin an end plate or end wall 55 of a stationary housing 56 (Figs. 2, 4, 5and 6)..

Adjacent the laterally projecting leg 51, the locking lever or slide bar50 is notched at '57 (Fig. 8) and its inncr end 553 reduced andprojecting into a turn button assembly 59. This latter assembly includesa bushing 61 having a transverse plate 62, diametrically spaced,longitudinally extending arms connecting the plate 62 .toa pair ofarcuate portions v63 fitting conformably-within the hollow interior of aturn button .54 (Fig. 3). Also mounted within the turn button is awasher having ,an annular peripheral flange 65 conformably fittingwithin the turn button and a cupped or annular reduction 66, with thebushing 61 and washer secured or staked within the turn button 64 byspaced indents .67 to completeqthe turn button assembly (Fig. 8).

The guide spring 47 spring-biases the locking lever or slide bar 50toward the inner knob end of the assembly (Fig. 3) and tends to movethis locking slide :bar 50 out of its locking position in the end plateor. wall 55 ,of the stationary housing 56. In assembled position, theelongated reduced end 53 of the locking lever or slide bar-50 projectsthrough an opening 68 in the transverseplate 62, through analignedopening in the cupped or annularreduction 66 of the Washer and intothehollow of the ,turn button 64.

The transverse plate 62 carried by the turn button 64 has opposedprojectiohs 69 one of which is provided with a tongue 71 (Fig. 3)projecting into a camming slot 72 having a lip 73 adjacent its narrowend 74 providing a recess for the reception and retention of the tongue71 when'the turn button 64 is rotated and forced inwardly to move thelocking lever or slide bar 50 to locking position,.and its other or wideend 75 provided with a recess to receive the tongue 71 when the turnbutton -,is moved through an arc of approximately to unlockedposition.The inner knob 13 is provided with ,a central opening having an inturnedflange 76 defining this opening and providing abearing for rotating andsliding movement of the turn button 64. The outer knob '10 is providedwith a similar opening defined by an inturned, cylindrical flange 76 forrotatably mounting the ,plug 77 of the key lock assembly .27.

The split cam 12 is cut away or notched (Fig. 8),; adjacent its innerend at 78 to provide longitudinally-extending and spaced camming edges79 and \cutawayor notched at 80. The inner tube 15 is alsolongitudinally notched or cutaway at .dladapted to be aligned With thenotch 73 when the split cam 12 and the .innertube v15 are assembled andsecured in assembled relation, and provided with longitudinallyeXtendingand spaced camming edges 82.

The cam and tube assembly .is journalled or rotatably mounted in thestationary housing 56 (Figs. l, 2 ,.3, 4, 5 and 7) comprisingasubstantially cylindrical wa1l;83;c.ut away or notched to provide-anopening .34 defined-by a pair of-inturnedand opposed flanges 285 each:provided at its outer endzwith aprojccting lipt86. .Thecylind-ricalwall 83 is further provided with spaced and-substantially diametricallyopposed inturned tongues or flanges '87 (Figs. 5 and 7) stamped and bent"or -forn1ed-inwardly With either providing a fulcrum about which afloating push plate'or follower 8? is adapted to-pivot'or rock This-push*plate or follower '83 seats orbears againstthe end of a pusher or slidemember 89 for retracting the latch bolt 91.

The push plate or follower 88 is of substantially greater width at itsend 92 and thereat provided with inturned flanges 93. At its other ornarrower end it is also provided with similar flanges 94 each bentinwardly to form enclosures as will be clearly apparent from Fig. 5,with the enclosures formed by the flanges 93 adapted to receive the ends95 of a coil spring 96 suitably anchored in the housing 56. The ends 95of the coil spring 96 spring-bias the push plate or follower 88 to itsneutral position as shown in Fig. 5, with rocking of this floating pushplate or follower being effected about either inturned tongue or flange87, providing a fulcrum on the interior of the housing 56.

The camming edges 79 of the split cam 12 and the camming edges 82 of theinner tube 15 are adapted to engage the flanged, inner side of pushplate or follower plate 80 and rock or rotate the latter which rockingmovement depresses the pusher or slide member 89 and retracts the latchbolt 91.

When the turn button is unlocked with the tongue 71 in the recess in thewidened end 75 of the camming slot 72, either the inside knob 13 or theoutside knob may be freely turned. When the unlocked inside knob isturned in either direction, the split sleeve 14 and the connected innertube 15 are turned and the rotating camming edges 82 on the inner tubeengage and rotate the push plate or follower 88 to depress the slidemember or pusher 89 and retract the latch bolt 91. When the turn button64 is in unlocked position, the outer knob 10 is also unlocked and maybe turned in either direction to rotate the connected cam tube 12 andcause either camming edge 79 of the camming tube to engage the pushplate or follower plate 88 and depress the pusher or slide member 89 forretracting the latch bolt 91.

When the turn button 64 is moved to locked position in which the lockinglever or slide bar is moved to the left or outwardly as shown in Fig. 3,the projection 53 on the leg 51 of this locking lever or slide barseating within a slot 97 in the end wall 55 of the stationary housing 56and the laterally projecting leg 51 enters the inner end of the slot 19in the cam tube 12 so as to lock the cam tube 12 and the outer knob 10against rotation. However, in such locked position of the turn button 64the inner knob may be freely rotated to open the door 11 from theinterior, the knob in turn rotating the inner tube 15 and rocking thefollower plate or push plate 88 to depress the slide member 89 andretract the latch bolt 91. But such turning movement of the inner knob13 does not release the locking lever or slide bar 50 from its lockedposition in the fixed end plate 55 on thestationary housing 56 so thatthe outer knob 10 and its cam tube 12 cannot be rotated. In order tothen release the latch bolt 91 from the exterior of the door 11 it isnecessary to insert the proper key 98 in the plug 77 of the key lockassembly 27 whereby turning of the key will rotate the inner tube 15 androck the follower plate or push plate 88 to retract the latch bolt 91.

The key lock assembly 27 includes the plug 77 fitting conformably in theopening defined by the inturned flange 76 in the outer knob 10, andcarrying plural tumblers 101 in radial recesses, a cylinder 102 carryingaligned drivers 103 for the tumblers and each driver spring-pressed by acoil spring 104 seating at its upper or outer end against a retainer105. A plug ring 106 carrying the lug or projecting end 45 extends intothe inner tube 15 and thereat engages the inturned flanges 44 on theouter end of the inner tube 15 whereby when the proper key 98 isinserted into the key lock assembly the key may be rotated and it inturn rotates the plug 77 and the plug ring 106 whereby the inner tube 15is rotated to cause one of its camming edges 82 to rock the followerplate or push plate 88 and retract the latch bolt 91.

Rotation of the inner tube 15 with the locking lever or slide bar 50 inits extended, locked position in the inner end of the slot 19 in the camtube 12 adjacent the notched portion is permitted by reason of the slot81 in the inner tube 15 and the connection between the cam tube 12 andinner tube 15, whereby the inner tube may rotate through an arcsuflicient to allow its camming edges 82 to abut and rock the followeror push plate 88 to depress the slide member or pusher 89 and retractthe latch bolt 91. At the same time the cam tube 12 is prevented frombeing rotated by the location of the leg 51 of the locking lever orslide bar 50 in the slot 19 and also in the slot 97 in the end wall 55of the stationary housing 56.

The end wall or plate 55 of the housing 56 is provided with a hub 107providing a bearing for rotatably receiving the cam tube 12, and isexternally threaded for detachably receiving the internally threaded hubof a clamping plate 108. This clamping plate 108 is adapted to beadjusted and bear against the exterior of the door 11 as shown in Fig.3, and is enclosed by an escutcheon 109 which covers this externalclamping plate and is preferably aflixed thereto by indentations 111 onits peripheral flange 112 interlocking with grooved portions on theperipheral edge 113 of the clamping plate 108.

The end wall 55 is rigidly fixed or secured to the outer edge of thecylindrical portion 83 of the stationary housing 56 by providing thisouter edge with crimped or undulated flanges or tongues 114 projectingoutwardly from the cylindrical wall 83 of the housing 56 over the endwall 55. An inner end wall or plate 115 is secured to the opposite endof the stationary housing 56 by crimped or undulated flanges or tongues116 projecting from the cylindrical wall 83 and crimped over the endwall 115 of the housing 56. This end wall 115 is provided with anoutwardly projecting hub 117 providing a bearing for the cam tube 12,and is provided with a pair of spaced projecting machine screws 118adapted to receive a removable inner clamping plate 119. These screwsare adapted to project through aligned keyhole slots in the innerclamping plate whereby when this inner clamping plate 119 is mountedover the head of the screws 11S and .is rotated so that the heads ofthese screws are disposed in the narrow ends of the keyhole slots andthe screws tightened, the inner clamping plate bears against the insideof the door 11 and the lock assembly is held in fixed position.

An escutcheon 121 is mounted over the inner clamping plate 119 anddetachably held in assembled relation by spaced snaps or detents 111detachably interlocking with the peripheral flange or edge 122 of theinner clamping plate 119. After the escutcheon has been assembled,

the inner knob 13 is then assembled and locked in position by the knobholder 31.

For locating the end plates or walls 55 and 115 of the housing 56 intheir proper location and spaced relation, the cam tube 12 is shown inFigs. 3, 5 and 8 as provided with a pair of projections 123 providingspaced stops or abutments.

When the cam tube 12, inner tube 15, sleeve 14 and the component partsof the locking mechanism shown in Fig. 8 are assembled, the inner tube15 is inserted into the cam tube 12 with the outer end of the inner tubecontaining the inturned flanges 44 being positioned adjacent the annularspring 24 (Fig. 7) and the strip 17 adjacent the inner end of the camtube 12 is indented into the arcuate, transverse slot 18 of the innertube 15 whereby to lock these concentric members together with the slot18 being of suflicient length to permit limited rotation therebetweenwhereby the caming edges 82 of the inner tube 15 actuate the follower orpush plate 88 to retract the latch bolt 91 upon turning of the innerknob 13 and its sleeve 14. Then the guide ring 46, the guide coil spring47, the guide washer 48 and the locking lever or sliding locking bar 50are inserted into the inner sleeve 15, with the projection 52. of thelocking bar 50 received in the opening 54 of the guidewasher 48 and the-ends of the cut-away peripheral portion 49- of thisguidewasher seatingupon the cammingedges 82 of the inner tube and rotatable therewith. Thesplit sleeve 14 is secured to the inner'end of'the'inner tube 15 bydepressing the tongues-41 into thelongitridinal slots'42 at the ends ofthe circumferentialgroove43 of theinner sleeve, the knob holder 31 andspring 33 are assembled in operative position'and'the turn buttonassembly 59 is mounted in the inner end of the split sleeve 14 with thetongue 71 on the transverse plate 62 of the turn button assemblyprojecting into-the camming slot 72.

The housing 56 with its-end plates and is assembled on the cam tube and'sleeve' assemblyin the manner shown in Fig. 7. Next the outer clampingplate 108, escutcheon 109, key lock-assembly 27 and outer knob 10 areassembled to form the unit assembly shown in Fig. 2 for insertionthrough a transverse bore 124 in the door 11.

The latch bolt assembly or unit designated generally by the referencenumeral 125 and also shown disassembled in Fig. 2, includes the slide orpusher 89, the latch-bolt 91 and its actuating mechanism in the latchbolt housing 126 and its face plate 127 fixed to the housing, is adaptedto be inserted in a bore in the edge of the door 11 and secured to thedoorin the manner shown in-Fig. 3.

In the assembly ofthese pro-assembled units, the housing 56 and itsassembly: is inserted into the transverse bore 124 in the door 11 to aposition in which the pusher or" slide member 89on'the inner end of thelatch bolt unit or assembly 125 may enter the opening 84' in the housing56, and when. the oppositely opening channels 128 on the inner'end'ofthe latch bolt housing 126 are aligned with the flanges 85 on thehousing 56, moving the housing assembly untilthe outer clamping plate108 abuts the door. 11 causing the oppositely projecting tongues orlips, 86 on the housing 56 to enter the channels 128 andthepre-assem'bled units are held in their proper assembled. relation asshown in Fig. l. The face plate 127 is then secured to the edge of'thedoor 11 by screws or other attaching means and the inner clamping'plate119, its escutcheon 121 and the inner. knob13 are applied in sequenceand assembled in their proper operative relation.

Figs. 9 and 10 disclose an alternate embodiment of the present inventionin which the outer knob, 129' is not provided with an openinglto,receive a key lock assembly and this knob-is. staked at 131 to the cam.tube 12; In

this vembodiment, the housing 132 comprises a cylindrical part 133 andan end wall or plate'134-secured thereto by spaced longitudinallyevteriding flanges 135 and 136 projecting through aligned slots in theend plate, with the projecting ends of flanges1135 and136 deformed tolock the'endwall to the housing; "This end wall is provided with n hub137 encompassing the cam tube 12 andheld in alignment by'means ofprojections 138 upstanding from the cam tube.

The inner end of thecylindrical. part 133 of the housing 132 is providedwith oppositely disposed inturned,

flanges .139, each tapped to receive a machine screw 141 for receiving aclamp plate 142v provided with arecess orslot to permit the plate toslip over the knob holder-31. This inner clamp plate 'is provided withoppositely disposed'bayonetslotseach adapted to receive the headof aSCI'CW141, andiwhen rotated to dispose the shank of the. screw in thenarrow end of the bayonet slot with, the'locating lugs "MU-located inthe transverse opening 12 in thedoorll and the screws tightened,attaches the clamp plate 142" upon the housing'and looks it against theadjacent face-of the-door. Wall or clamp plate 134, this clamp plate142is provided with a hub 143 in which the inner end ofthe cam tube 12is-journalled.

Unlike the-embodimentsshownin Figs. 1 to '8, in-

Like the end I elusive, 'theouterend wall or plate 134 bears against"the outer face of the door 11 and is adapted to'receive an escutcheon'144; Any adjustment relative to the thickness of the door isaccomplished by adjusting the. inner clamp plate 142 which functions asa combined end wall and clamping plate for the housing and on which theinner escutcheon 144 is mounted.

In other respects the component parts of this alternate assembly'aresimilar to that of the embodiment of- Figs. 1 m8, inclusive, and likereference characters have been applied to similar parts.

1111 this latter form of the invention, the housingassembly is ofsimplified construction and of decreased cost,'and although it does notpermit the range of adjustment contemplated by the housing embodied inthe lock of'Figs. l to 8, inclusive, it has the advantage that inprefabricated homes and in ready-hung doors, the latch bolt assemblymaybe initially mounted in the door for shipment and at the place offinal installation the housing and its cam tube assembly may be readilyinsertedto complete the lock assembly.

Having thus disclosed the invention, we claim:

1. In a door lock construction including a latch bolt, a stationaryhousing including a substantially cylindrical part and end Walls adaptedto be received and fit conformably in a transverse bore in the door, asplit cam tubejournalled in the end walls of the housing, a knob securedto the outer end of the cam tube, a split sleeve, a knob secured to theinner end of the sleeve, an inner tube arranged in'concentric relationwithin the adjacent end of the cam tube' and sleeve, means forconnecting the inner end of the inner tube to the sleeve whereby thesleeve and inner tuberotate together, means for connecting the innertube to the cam tube but permitting the inner tube limitedrotationWithin the cam tube, said cam tube and said inner tube each beingslotted to provide thereon longitudinally extending, spaced cammingedges, thecamming edges on the cam tube being rotated by turning of theouter knob and the camming edges of the inner tube being rotated byturning of the inner knob, an opening in the cylindrical part of thehousing aligned with the slots in the cam tube and inner tube, and'afloating push plate in said opening in the housing and adapted toretract the latch bolt when rocked by turning of the' outer knob and itscam tube or by turning of the inner knob; its sleeve and the inner tube.

2.In"a door look as set forth in claim 1, including a turnbutton carriedby the inner knob and projecting 111101116 split sleeve and through theinner knob, and locking: means in the inner sleeve actuated by turningof'the button for locking the cam tube to the stationary housing whenthe turn button is turned in one direction to prevent the cam tube andits outer knob from turning to retract the latch bolt.

3. In adoor lock as set forth in claim 1, including a turn buttoncarried by the inner knob and projecting through the inner knob, and alocking bar slid-ably mounted in the inner tube and actuated by turningofthe turn button in one direction to lock the cam tube and its outerknob against rotation until the turn button is turned to releaseposition.

4. In a door lock as set forth in claim 1, including a turn-buttoncarried in the inner knob and projecting into the split sleeve, alateral projection on and rotatable -with the turn button, a cam slot inthe split sleeve with an end'of the lateral projection extending into.the cam slot for controlling longitudinal movementrof the lateralprojection and the turn button, and spring-biased lockingrneans carriedin the inner tube and movable longitudinally thereinupon turningmovement of the turn button,- said locking means engageable in the splitof the cam-tube and locking this can! tube and its connected outerkn'obagainst rotation when the turn'button is turned inone direction-andreleasing the cam tube and outer knob when the turn button is turned inthe other direction, whereupon the spring-biased locking means is movedto inoperative position.

5. In a lock construction for a door or other closure having aretractable latch bolt, an assembly including a cam tube having itsouter end extending to the exterior of the closure, a knob mounted onthe outer end of the cam tube and adapted to rotate the latter toretract the latch bolt, a sleeve at the interior of the closure, a knobmounted on the sleeve for rotating the sleeve from the interior of theclosure, an inner tube connecting the cam tube and sleeve with the innertube rigidly connected to the sleeve for rotation therewith butconnected to the cam tube in such manner as to permit limited rotationbetween the cam tube and the inner tube, a housing having end walls eachprovided with a bearing in which the cam tube is rotatably mounted,said'cam tube and inner sleeve provided with spaced camming edges andsaid housing having an opening aligned with said camming edges, aspring-biased follower plate loosely mounted in the opening in thehousing for retracting the latch bolt when the cam tube is rotated bythe outer knob and either of its camming edges rocks the follower plateto retract the latch bolt, or the inner tube and sleeve are rotated bythe inner knob whereupon either cam edge of the inner tube rocks thefollower plate to retract the latch bolt, a turn button carried in theinner knob and a locking bar actuated by turning of the turn button inone direction to engage and lock the cam tube and its outer knob againstrotation and releasing the locking bar from engagement with the cam tubewhen the turn button is turned in the other direction.

6. In a lock construction as set forth in claim 5, including a key lockmounted in the outer knob and cam tube and having a projection engagingthe outer end of the inner tube for rotating the inner tube to rock thefollower plate and retract the latch bolt while the cam tube and outerknob are locked against rotation.

'7. In a lock construction as set forth in claim 5, including akey-operated tumbler lock carried in the outer knob, and adapted torotate the inner tube to rock the follower plate and retract the latchbolt without unlocking the cam tube and its knob.

8. In a door lock assembly for retracting a latch bolt to permit openingof the door, a housing having an end plate at the opposite ends of thehousing, a cam tube eX- tending through the housing and journalled inthe end plates, an inner concentric tube in the cam tube, means forconnecting the outer end of the inner tube to the cam tube butpermitting limited rotation therebetween, a sleeve encompassing theinner end of the inner tube and afiixed thereto, an outer knob mountedon and affixed to the outer end of the cam tube for rotating the latter,an inner knob mounted on and affixed to the sleeve for rotating thesleeve and the inner tube relative to the cam tube and its knob, a turnbutton carried in the inner knob and having a projection rotatable andmovable longitudinally of the sleeve in a camming slot provided in thesleeve, and a locking bar actuated by said push button and slidablymounted in the inner tube for locking the cam tube and the outer knobagainst rotation.

9. In a lock construction for a door or other closure having aretractable latch bolt, a stationary housing fitting conformably in atransverse opening in the closure, a split cam tube projecting throughand rotatably mounted in the housing, a knob mounted on the outer end ofthe cam tube to rotate the latter, a split sleeve adjoining the innerend of the cam tube, a knob for the interior of the closure mounted onand rotating the sleeve, an inner tube conformably received in theadjoining ends of the sleeve and cam tube, means for connecting theinner tube and sleeve whereby they rotate together upon turning theinner knob, means for connecting the inner tube to the cam tube wherebythe inner tube is rotatable relative to the cam tube, said inner tubeand cam tube each being slotted to provide spaced camming edges and saidhousing provided with an opening aligned with the slots of the cam tubeand inner tube, a floating push plate mounted in the opening in thehousing and adjacent the camming edges of the cam tube and inner tube,means in the housing providing a fulcrum for rocking movement of saidpush plate in either direction as the cam tube is rotated by its knob,or the inner tube is rotated by turning of the inner knob, locking meanscarried in the inner tube and a turn button carried by the inner knob,said locking means upon turning of the button in one direction lockingthe cam tube and its outer knob against rotation but permitting theinner knob, the sleeve and the inner tube to be rotated to retract thelatch bolt, and when the button is turned in the other directionreleasing the cam tube and permitting either the outer or the inner knobto be turned to release the latch bolt and opening of the closure.

10. In a lock construction as set forth in claim 9, including akey-operated lock carried in the outer knob and cam tube and havingmeans engaging and turning the inner tube to rock the push plate andretract the latch bolt when the cam tube and the outer knob are lockedagainst rotation.

11. In a door lock assembly for retracting a latch bolt to permitopening of the door, a housing having an end plate at the opposite endsof the housing, a cam tube extending through the housing and journalledin the end plates, an inner concentric tube in the cam tube, means forconnecting the outer end of the inner tube to the cam tube butpermitting limited rotation therebetween, a sleeve encompassing theinner end of the inner tube and afiixed thereto, an outer knob mountedon and affixed to the outer end of the cam tube for rotating the latter,an inner knob mounted on and affixed to the sleeve for rotating thesleeve and the inner tube relative to the cam tube and its knob, a turnbutton carried in the inner knob and having a projection rotatable andmovable longitudinally of the sleeve in a camming slot provided in thesleeve, and a locking bar actuated by said push button and slidablymounted in the inner tube, said locking bar having an end projectinginto and engaged by the turn button and a projection at the other endreceived in a slot in the cam tube and another projection at the otherend adapted to be received in a slot in the housing for locking the camtube and the outer knob against rotation.

12. In a door lock assembly as set forth in claim 11, including akey-operated tumbler lock carried in the outer knob and adapted torotate the inner tube to retract the latch bolt without unlocking thecam tube and the outer knob.

References Cited in the file of this patent UNITED STATES PATENTS2,193,349 Schlage Mar. 12, 1940 2,370,690 Schlage Mar. 6, 1943 2,662,386Hillgren Dec. 15, 1953

